DTV stations that are marginal - most of the time they're fine, but sometimes they pixelate or drop out: KRON, KTVU, KDTV.

DTV stations that come in at least sometimes, but are not 100% coverage: KSBW, KCBA, KRCB.

DTV stations that don't come in at all, but I don't see why not: KTLN, KTNC.

If I go up to the roof and aim the UHF a little bit more northerly from where it is now, KRCB, KTLN and KTNC seems to come in a little better, but KTVU and KRON start getting more marginal. We're talking about maybe 5 degrees, with an antenna whose half power beam-width is more like 30 degrees.

The only thing I can think of is that perhaps the pre-amp is being overloaded and that it's pushing the weaker signals down a little. If that's the case, then the analog shutdown next February will help somewhat.

The shutdown will certainly help KSBW and KCBA, which currently suffer co-channel interference from KXTV-TV and KOVR-TV. We also will likely be able to pick up KAXT-LD. At the moment, KAXT-LD is co-channel with KTNC-TV. One worry is that KRCB-DT is going to be co-channel with KMUV-LP, but fortunately it will be in the opposite direction, so the antenna's front-to-back ratio should bury it. The bad part about that is that we will have no chance at all of picking up the other UHF channels from Fremont Peak: KQET and KSMS. But KQET is redundant if you can receive KQED and KTEH already (KQET-1 is the same as KQED-1, KQET-2 is the same as KTEH-1 and KQET-3 is V-Me, which is on KTEH-5), and KSMS is a Univision affiliate like KDTV.